This may well be misleading. You should take the cost of the panels, batteries, inverter, maintenance, and installation; subtract off any subsidies or tax credits that you may have received; then divide that total by the usable lifespan of the solar cells. Lastly, take your current cost of electricity and add it to this amount. Subtract this amount from your old monthly bills. This is your savings. Hopefully this is actually saving you money.

They chopped off the X and Y descriptors in image! The 'study' that the article points to has the image in it's entirety. It's the percent of posts per sub over time. This isn't a matter of the site becoming less valuable, but instead becoming more diverse, and diversity is required if we want this site to thrive. The graph is useful to see where the breakdown of 100% of new submissions are being allocated, but it's not the correct type of graph to show the growth of the site as a whole.

This isn't true. The technical subs are as active as ever, and in most cases more-so. We've only added other demographics to the larger picture, which is required for the site to turn profitable and become sustainable.